Table 2.

Prediction performance of the dry matter intake-based (DMI-B) models (CH₄ yield; g/kg DMI) developed using conventional method and four machine learning methods.

	Conventional	glmmLasso	LASSO	SCAD	RF-B
RMSPE	2.12	1.99	1.89	1.92	1.99
Reduction of RMSPE (%)	–	6.22	11.12	9.66	6.50
MAE	1.65	1.51	1.43	1.48	1.52
Reduction of MAE (%)	–	8.21	13.31	9.97	7.36
CCC	0.28	0.46	0.57	0.51	0.48
Increase of CCC (%)	–	68.73	106.18	84.36	73.09

See the notes of Table 1.